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California Air Resources Board (ARB) staff have posted version
2.0 of the California-Modified Greenhouse Gases, Regulated
Emissions, and Energy Use in Transportation (CA-GREET) Tier 1 and
Tier 2 models.  Tier 1 refers to conventionally produced
first-generation fuels (e.g., starch- and sugar-based ethanol,
biodiesel, renewable diesel, compressed natural gas, liquefied
natural gas). Tier 2 refers to next-generation fuels (e.g.,
cellulosic alcohols, hydrogen, drop-in fuels). The CA-GREET
models can be accessed at:
http://www.arb.ca.gov/fuels/lcfs/ca-greet/ca-greet.htm

ARB staff has also posted the Oil Production Greenhouse Gas
Emissions Estimator (OPGEE) version 1.1 Draft E. The revised
model and associated documentation used to estimate carbon
intensity values for crude oil can be accessed at:
http://www.arb.ca.gov/fuels/lcfs/crude-oil/crude-oil.htm.

These updated models are incorporated by reference into a 15-day
change rulemaking package. Assuming the Board adopts this
package, these models will be used to calculate the Carbon
Intensity of the fuels under the Low Carbon Fuel Standard
Program.

The Low Carbon Fuel Standard, a regulation to reduce the carbon
intensity of fuels sold in California ten percent by 2020, is one
of the measures adopted by the California Air Resources Board,
pursuant to Health and Safety Code Sections 38500-38599 (AB 32)
to reduce greenhouse gases in California. It is designed to help
clean the air, protect the environment, and drive the development
of clean, low-carbon fuels to improve California's energy
security and energy independence.

If you have any questions, please contact Sam Wade, Chief,
Transportation Fuels Branch, at (916) 322-8263.



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Visit www.SaveOurH2O.org for water conservation tips.

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